Design Of A New High Energy Rear Underrun
Protective Device
Author(s)
F. Cappello, T. Ingrassia & V. Nigrelli
Abstract
In recent years the vehicle design field has followed a progressive evolution by
focusing its main interest on passive and active safety levels. One of the most
injurious cases for the safety of passengers is the crash between a car and a
heavy vehicle (truck).
Generally, in fact, when such an occurrence happens, the greatest damage is
suffered by the passengers of the car. This is because of the considerable
structural difference between the two vehicles and the lack of devices to reduce
the injuries of the car passengers. In this work, as a consequence of the previous
considerations, we deal with the design of a new protective system for heavy
vehicles over 3.5 tons. The new rear underrun protective device presented here,
compared to the traditional one, can dissipate a greater amount of energy; this
reduces the damage suffered by the passengers of a car involved in an impact
with a truck. To simulate the behaviour of the new protective device during
different kinds of crashes, dynamic finite element method (FEM) analyses have
been carried out. The comparison between the new protective system and the
standard one has shown that the new designed protective system has better
performances in terms of energy absorption and peaks of decelerations.
Keywords: RUPD, FEM, crash analyses.
1 Introduction
Usually when a road accident between a car and a heavy vehicle happens, all the
protection features for the occupants built into the car, such as seatbelts and
airbags, have a reduced effectiveness. This because of the very big differences in
geometry and stiffness between the two vehicles. The very large height of the
truck, especially when the heavy vehicle is not equipped with a suitable
Keywords
RUPD, FEM, crash analyses.
Related Book
Other papers in this volume
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